Fully Solved
Multiple Choice Questions For IES
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MECHANICAL
ENGINEERING
4400
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4400 Multiple Choice Questions for IES, GATE, PSUs : Mechanical Engineering Copyright © 2015, by MADE EASY Publications. All rights are reserved. No part of this publication may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photo-copying, recording or otherwise), without the prior written permission of the above mentioned publisher of this book.
First Edition: 2014 Second Edition: 2015 ISBN: 978-93-5147-100-4
Published by: MADE EASY Publications, New Delhi-110016
PREFACE It gives me great happiness to introduce the revised edition on Mechanical Engineering containing nearly 4400 MCQs which focuses in-depth understanding of subjects at basic and advanced level which has been segregated topic-wise to disseminate all kind of exposure to students in terms of quick learning and deep apt. The chapter wise segregation has been done to align with contemporary competitive examination pattern. Attempt has been made to bring out all kind of probable competitive questions for the aspirants preparing for IES, GATE, PSU. The content of this book ensures threshold level of learning and wide range of practice questions which is very much essential to boost the exam time confidence level and ultimately to succeed in all prestigious engineer’s examinations. It has been ensured from made easy team to have broad coverage of subjects at chapter level. Year by year number of competitors are increasing and the variety of questions asked in examination is widening, under such scenario this book will definitely help students to enhance their skills required to succeed in competitive exams like IES, GATE, PSUs, State Engineering Services etc. While preparing this book utmost care has been taken to cover all the chapters and variety of concepts which may be asked in the exams. The solutions and answers provided are upto the closest possible accuracy. The full efforts have been made by MADE EASY Team to provide error free solutions and explanations. I have true desire to serve student community by way of providing good sources of study and quality guidance. I hope this book will be proved an important tool to succeed in competitive examinations. Any suggestions from the readers for the improvement of this book are most welcome.
B. Singh (Ex. IES) Chairman and Managing Director MADE EASY Group
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CONTENTS I.
II.
THERMODYNAMICS ....................................... 1
4.
Fuel Injection, Ignition & Carburation ....... 163
1.
Basic Concepts .................................................................2
5.
Combustion & Combustion Chambers ..... 172
2.
Temperature .....................................................................6
6.
Supercharging.................................................... 179
3.
Work and Heat Transfer.................................................9
7.
Engine Friction, Lubrication & Cooling ..... 182
4.
First Law of Thermodynamics .................................. 14
8.
Engine Emissions & their Control ................ 185
5.
First Law Applied to Flow Process .......................... 18
9.
Testing & Performance .................................... 188
6.
Second Law of Thermodynamics ........................... 20
7.
Entropy ............................................................................ 25
8.
Availability & Irreversibility ....................................... 31
1.
Properties of Fluids........................................... 194
9.
Properties of Pure Substance................................... 33
2.
Pressure and Its Measurement ..................... 201
10. Properties of Gases ...................................................... 36
3.
Hydrostatic Forces on Surfaces .................... 205
11. Thermodynamic Relations........................................ 42
4.
Buoyancy and Floatation ............................... 210
5.
Kinematics of Flow and Ideal Flow ............. 214
REFRIGERATION & AIR CONDITIONING .....47
6.
Dynamic of Fluid Flow..................................... 220
1.
Basics of Refrigerating Machine ............................. 48
7.
Flow Over Notches and Weirs ....................... 225
2.
Refrigeration Cycles & Systems ............................... 54
8.
Viscous Flow........................................................ 228
3.
Refrigerants .................................................................... 67
9.
Turbulent Flow ................................................... 232
4.
Refrigerant Compressors........................................... 73
5.
Condensers, Evaporators & Expansion Devices 75
6.
Properties of Moist Air................................................ 78
12. Flow in Open Channel ..................................... 245
7.
Psychrometric Chart & its Application to AirConditioning .................................................................. 84
13. Dimensional and Model Analysis ................ 248 14. Forces on Submerged Bodies ....................... 252
8.
Comfort Conditions..................................................... 92
15. Flow of Compressible Fluids ......................... 254
9.
Solar Refrigeration ....................................................... 95
10. Air-duct Design ............................................................. 97
III. HEAT AND MASS TRANSFER ..................... 100
V.
FLUID MECHANICS .............................. 193
10. Flow Through Pipes .......................................... 235 11. Boundary Layer Theory ................................... 240
VI. POWER PLANT ENGINEERING ............ 257 1.
Fuels and Combustion .................................... 258
2.
Analysis of Steam Cycles................................. 262 Steam Generators ............................................. 270
1.
Basic Concepts of Heat Transfer ............................101
3.
2.
One-Dimensional Steady-state Conduction ....106
4.
Steam Turbines .................................................. 276
3.
Heat Dissipation from Extended Surface ..........116
5.
Nuclear Power Plants ....................................... 289
4.
Transient Heat Conduction ....................................119
6.
Hydroelectric Power Plant ............................. 293
5.
Heat Transfer by Natural Convection ..................122
7.
Hydraulic Pump ................................................. 300
6.
Heat Transfer by Forced Convection ...................125
8.
Energy Transfer .................................................. 306
7.
Radiation Heat Transfer............................................129
9.
Compressors ....................................................... 309
8.
Condensation and Boiling ......................................136
10. Gas Turbine Power Plants ............................... 316
9.
Heat Exchanger...........................................................139
11. Jet and Rocket Propulsion System .............. 321
10. Fundamentals of Diffusive & Convective Mass Transfer ..........................................................................143
VII. STRENGTH OF MATERIALS ................. 324
IV. I.C. ENGINE ................................................. 145
1.
Mechanical Properties of Materials ............ 325
2.
Stress-Strain Relations & Elastic Constants ....... 333
1.
Basics ..............................................................................146
3.
Tension, Compression and Shear ................ 338
2.
Air Standard Cycles....................................................151
4.
Torsion of Shafts ................................................ 346
3.
Conventional & Alternative Fuels .........................158
5.
Shear Force and Bending Moment ............. 353
vi Stresses in Beams ......................................... 359
7.
Analysis of Stress and Strain..................... 364
1.
Casting Processes................................................................ 550
8.
Deflection and Theories of Failure ......... 371
2.
Forming Processes .............................................................. 560
9.
Thin & Thick Walled Pressure Vessels .... 380
3.
Powder Metallurgy ............................................................. 571
10. Struts and Columns ..................................... 386
4.
Metal Cutting and Tool Materials .................................. 575
11. Helical Springs............................................... 392
5.
Machining Processes ......................................................... 587
6.
Joining Processes ................................................................ 597
7.
Unconventional Machining Process............................. 606 Numerical Control of Machine Tools ............................ 610 Jigs and Fixtures .................................................................. 614
VIII. THEORY OF MACHINES ...................395 1.
Mechanisms and Machines ...................... 396
8.
2.
Velocity and Acceleration Analysis ........ 404
9.
3.
Mechanism with Lower Pairs ................... 410
10. Fits and Tolerance ............................................................... 616
4.
Cams ................................................................. 413
11. Metrology .............................................................................. 619
5.
Toothed Gearing .......................................... 416
6.
Gear Trains ...................................................... 423
7.
Static and Dynamic Force Analysis ........ 428
1.
Plant Layout .......................................................................... 624
8.
Flywheels ........................................................ 433
2.
Loading and Scheduling .................................................. 628
9.
Balancing ........................................................ 438
3.
Assembly Line Balancing.................................................. 634
10. Governors ....................................................... 442
4.
Product Development ....................................................... 636
11. Linear Vibration Analysis ........................... 447
5.
Forecasting ............................................................................ 638
6.
Break Even Analysis ............................................................ 642
7.
Work Study ............................................................................ 645
Design Against Static Load ....................... 458
8.
Material Requirement Planning..................................... 650
2.
Design Against Fluctuating Load ........... 464
9.
Quality Analysis and Control........................................... 652
3.
Shafts, Keys and Couplings....................... 468
10. Inventory Control ................................................................ 656
4.
Threaded Joints and Power Screws ....... 474
11. PERT and CPM ...................................................................... 662
5.
Welded and Riveted Joints ....................... 481
12. Linear Programming .......................................................... 667
6.
Friction Clutches........................................... 488
13. Transportation and Assignment Models .................... 670
7.
Belt, Rope and Chain Drives ..................... 493
14. Queuing Theory ................................................................... 672
8.
Bearings ........................................................... 499
15. Value Engineering............................................................... 676
9.
Gears ................................................................. 507
OOOO
IX. MACHINE DESIGN .............................457 1.
X.
XI. PRODUCTION ENGINEERING........................... 549
6.
MATERIAL SCIENCE ..........................511 1.
Structural of Metals and Alloys ............... 512
2.
Equilibrium Diagrams & Phase Changes ...... 518
3.
Heat Treatment of Steels ........................... 524
4.
Plastics, Ceramics & Composite Materials .... 530
5.
Mechanical Properties................................ 536
6.
Engineering Alloys & Its Common Applications ................................................... 542
XII. INDUSTRIAL ENGINEERING ............................. 623
